weird.
I just checked syfy.com from work and it loads the episodes right up.
My internet comes through TWC at home and Comcast at work, but there isn't any cable television subscription attached to either and never has been.
Maybe they are checking the IP source and if it comes through TWC or comcast it bypasses the login requirement. I'll be on my brother's internet this weekend which isn't tied to a cable service. I'll try it on his to see if there is a login requirement.